What you want in a scale is repeatability (i.e. a measurement is the same, time after time). Accuracy is less important -- seriously, does it REALLY matter if you weigh 199 lbs or 197.5 lbs? Especially since the margin of error on a spring scale (which is your typical, non-doctor's office home scale) is generally +/- 10 lbs. What is important is that you can step on the scale twice and come out at the same number value, and that you use the same scale to measure your progress. The relative values are important, not the absolute numbers. Given that, any mid-priced bathroom scale at your local department store will work well. The features offered (i.e. colored pointy things to set at your weight, etc.) will be reflected in the price. Electronic scales are becoming more common -- keep in mind again that the features offered may be unreliable (body fat percentage measurement, for example) or not of general value. I find that a simple spring scale with BIG numbers works for me, as I track my weight via a computer program anyways, and I paid around $45 for it.
Good luck!
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